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035-16473-001 Rev. A (202)
Unitary Products Group 3
All E*TS systems are equipped with
balance point control to provide even
more efficient operation. This control
will prevent the electric heater from
being energized when the outdoor air
is above some predetermined temper-
ature setting (0 to 45° F). At higher
temperatures, your system will provide
all the heat your home will ever need.
At lower temperatures, the supplemen-
tal electric heat will be energized to
keep your home comfortable.
When the outdoor air is cool and moist,
frost may form on the surface of your
outdoor coil. When this frost builds to a
certain point, your system will switch to
a defrost cycle. Although you may feel
cooler air coming from your registers,
DO NOT adjust your thermostat. The
frost will melt quickly, and your system
will return to normal operation auto-
matically.
COOLING CYCLE
Switch your thermostat to cool. Select
a comfortable thermostat temperature
setting, typically between 75 and 80°.
Comfort sensations vary with individu-
als. The lower the indoor temperature
desired, the greater will be the number
of hours your unit must operate.
Set your thermostat 2 or 3° F below
normal several hours before entertain-
ing large groups during hot weather.
People give off considerable heat and
moisture.
On an extremely hot day, the indoor
temperature may rise 3 to 6° F above
the thermostat setting. Properly
selected equipment does not have the
capacity to maintain a constant indoor
temperature during this peak load.
Over-sizing your system to handle this
peak load isn't practical because the
oversized system would operate much
less efficiently at all other conditions.
TO MAXIMIZE OPERATING
EFFICIENCY
HEATING CONSERVATION
For the most sufficient operation, keep
storm windows and doors on all year
long. They not only help to insulate
against heat and cold, but keep out
dirt, pollen and noise, too.
Closing the drapes at night, keeping
fireplace dampers closed when not in
use, and running exhaust fans only
when necessary, will help you to retain
the air you have already paid to heat.
COOLING CONSERVATION
To comfortably cool your home, your
heat pump must remove both heat and
humidity. Don't turn your system off
even though you will be away all day.
On a hot day, your system may have to
operate between 8 and 12 hours to
reduce the temperature in your home
to a normal comfort level.
Keep windows closed after sundown.
While the outdoor temperature at night
may be lower than indoors, the air is
generally loaded with moisture which is
soaked up by furniture, carpets, and
fabrics. This moisture must be
removed when you restart your sys-
tem.
The hotter the outside temperature, the
greater the load on your system.
Therefore do not be alarmed when
your system continues to run after the
sun has set on a hot day. Heat is
stored in your outside walls during the
day and will continue to flow into your
home for several hours after sunset.
Use your kitchen exhaust fan when
cooking. One surface burner on "High"
requires one ton of cooling. Turn on
your bathroom exhaust fan while
showering to remove humidity.
You can also help your system in the
summer by closing drapes or blinds
and by lowering awnings on windows
that get direct sunlight.
CARE OF SYSTEM
A periodic inspection, cleaning, lubrica-
tion and adjustment of your heat pump
is available from your dealer. Be sure
to ask him about this service. For
those who prefer to do-it-yourself, fol-
low the instructions below to care for
your system.
COIL CARE
Keep outdoor unit free of snow, foliage
and grass, grass clippings, leaves,
paper, and any other material which
could restrict proper air flow in and out
of the unit. The coil may be vacuumed
to remove any debris from between the
fins.
If the coil becomes excessively dirty,
turn the Main Disconnect Switch to
“OFF” and wash the coil with your gar-
den hose. Avoid getting water into the
fan motor and control box. Flush dirt
from base pan after cleaning the coil.
FILTER CARE
Inspect the air filter(s) at least once a
month. If they are dirty, wash reusable
filters with a mild detergent per manu-
facturer's recommendations. Replace
disposable filters with new filters.
Install the clean filters with “air flow”
arrow in the same direction as the air
flow in your duct. Filters should be
clean to assure maximum efficiency
and adequate air circulation. Drapes,
furniture or other obstructions blocking
your supply and return air grilles will
decrease efficiency.
NOTE: There will be no heat available
until power is reestablished.
HEATING SEASON
1. Leave on Emergency Heat for at
least 8 hours after electrical power
is reestablished if the power was
off more than 8 hours.
2. Switch thermostat back to Heating
or Auto.
COOLING SEASON
1. Switch thermostat to Off position.
FIGURE 2:
FIGURE 3: